XE8000EV120 Semtech, XE8000EV120 Datasheet - Page 64

• Manufacturer Part Number: XE8000EV120
• Description: BOARD EVAL FOR SX8722I070TRLF
• Manufacturer: Semtech
• Series: ZoomingADC™r

Specifications of XE8000EV120

• Number Of Adc's: 1
• Number Of Bits: 16
• Data Interface: I²C
• Inputs Per Adc: 7 Single or 4 Differential
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: SX8722
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: XM8000EV120; XM8000EV120

12.8.4. Elementary Conversions
As mentioned previously, the whole conversion sequence is made of a set of N
This number is set with the word SET_NELC[1:0] in power of 2 steps (see Table 50) given by:
As already mentioned, N
12.8.5. Resolution
The theoretical resolution of the ADC, without considering thermal noise, is given by:
ACS - Revision 4.2
©2008 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
n
=
N
2
ELCONV
⋅
log
2
(
=
OSR
2
(Eq. 14)
(Eq. 15)
SET_NELC[1
ELCONV
)
+
log
October 2008
must be equal or greater than 2 to reduce internal amplifier offsets.
2
(
N
Table 51. Number of elementary conversion
ELCONV
:
Table 50. Over-sampling ratio settings
0]
(RegACCfg[4:2])
(RegACCfg[4:2])
SET_OSR[2:0]
SET_OSR[2:0]
)
010
011
100
101
110
111
00
01
10
11
[
bits
Page 64
]
Conversion N
Over-Sampling Ratio
# of Elementary
OSR [-]
High gain acquisition for sensor interface
1024
128
256
512
32
64
1
2
4
8
ELCONV
ELCONV
[-]
elementary incremental conversions.
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SX8722